From Unofficial Stationeers Wiki
Soy can be grown in hydroponics trays. Provide water in and out of the tray and CO2 at 15oC-50oC. The plants will produce oxygen and heat which you will need to remove.
|Time To Fruiting||1.4 Days*|
|Edible By Chickens||Yes|
Science: * Fruiting times may be complicated as this time is in mars days and the result would be better measured in KW generated from 1 solar panel using the Accurate Solar Setup. I dont know yet if plants work like solar panels and as there is no soybean article, this will do just fine ! I Expect time to fruiting to become far more complicated in the future.